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Subject :NSO    Class : Class 8

Richa conducted an experiment as shown in the figure to investigate how the height of the ramp affects the amount of force needed to move a wooden block up the ramp.

Which of the following variables must be kept the same to ensure that her experiment is fair?
I. Number of bricks
II. Material of the ramp
III. Size of the wooden block
IV. Mass of the wooden block

AI, II and III only
BI, III and IV only
CII, III and IV only
DI, II, III and IV


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Subject :NSO    Class : Class 8

Match column I and column II and select the correct option from the given codes.

  Column I   Column II
P. Electroscope (i) Conductor
Q. Copper (ii) Lightning rods
R. Spikes (iii) Ozone
S. Lightning (iv) Charge

AP-(iv), Q-(i), R-(ii), S-(iii)
BP-(ii), Q-(iii), R-(iv), S-(i)
CP-(iii), Q-(iv), R-(i), S-(ii)
DP-(iii), Q-(i), R-(ii), S-(iv)


Answer is C.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
grass is a weed!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 2:

Class : Class 7
Yes grass is a weed

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
I don't find any mistake here.. Maybe there is some.. Btw the answer is option d

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
d is the answer

Ans 2:

Class : Class 6
d is the answer

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 4

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